# US 2025/0221237 A1 · Release film > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0221237 A1 - Document ID: US20250221237A1 - Status: Published application - Kind: A1 - Application number: 18/906,640 - Filed: 2024-10-04 - Published: 2025-07-03 - Earliest claimed: 2024-01-02 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: JOONHYUK JANG - Web page: https://patentgrep.com/patent/US20250221237A1 ## CPC - H10K 59/80: Constructional details - B32B 3/266: {characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12} - B32B 7/02: Physical, chemical or physicochemical properties - B32B 7/06: permitting easy separation - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 2307/732: Dimensional properties - B32B 2307/748: Releasability - B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM ## Abstract Provided is a release film including a protective film on a rear surface of a display device, in a periphery of a first hole defined in the display device, and a hole film adjacent to the protective film on the rear surface of the display device, and overlapping the first hole. The hole film may include a first hole film on the rear surface of the display device, and a second hole film including a first portion on an upper surface of the protective film and an upper surface of the first hole film, and an adhesive strength between the rear surface of the display device and a lower surface of the first hole film is smaller than an adhesive strength between a lower surface of the first portion and the upper surface of the protective film. ## Claims ### Claim 1 A release film comprising: a protective film on a rear surface of a display device and in a periphery of a first hole defined in the display device; and a hole film adjacent to the protective film on the rear surface of the display device, and overlapping the first hole, wherein the hole film comprises: a first hole film on the rear surface of the display device, and a second hole film comprising a first portion on an upper surface of the protective film and an upper surface of the first hole film, and an adhesive strength between the rear surface of the display device and a lower surface of the first hole film is smaller than an adhesive strength between a lower surface of the first portion and the upper surface of the protective film. ### Claim 2 (depends on 1) The release film of claim 1, wherein an adhesive strength between a lower surface of the first hole film and the rear surface of the display device is 0 gf/in. ### Claim 3 (depends on 2) The release film of claim 2, wherein an adhesive strength between the lower surface of the first portion and the upper surface of the protective film is about 10 gf/in to about 20 gf/in. ### Claim 4 (depends on 1) The release film of claim 1, wherein when viewed on a plane, an area of the first portion is greater than an area of the first hole film. ### Claim 5 (depends on 4) The release film of claim 4, wherein the second hole film further comprises a second portion extending from the first portion and protruding further outward than a border of the display device. ### Claim 6 (depends on 4) The release film of claim 4, wherein the protective film comprises a first protective film, a second protective film, and a third protective film which are sequentially stacked from a lower part to an upper part. ### Claim 7 (depends on 6) The release film of claim 6, wherein when viewed on a plane, an area of the second protective film is greater than an area of the third protective film, and a portion of the second protective film is exposed from the third protective film. ### Claim 8 (depends on 7) The release film of claim 7, wherein the lower surface of the first portion is on an upper surface of a portion of the second protective film exposed from the third protective film. ### Claim 9 (depends on 7) The release film of claim 7, wherein a sum of a thickness of the first protective film and a thickness of the second protective film is the same as a thickness of the first hole film. ### Claim 10 (depends on 9) The release film of claim 9, wherein a thickness of the first hole film is greater than a thickness of the second hole film. ### Claim 11 A release film comprising: a protective film on a rear surface of a display device and in a periphery of a first hole defined in the display device; and a hole film adjacent to the protective film on the rear surface of the display device, and overlapping the first hole, wherein the hole film comprises a first hole film on the rear surface of the display device and a second hole film adhered to the first hole film, an adhesive strength between the rear surface of the display device and a lower surface of the first hole film is 0 gf/in, and a border of the second hole film protrudes further outward than a border of the first hole film and adheres to an upper surface of the protective film. ### Claim 12 (depends on 11) The release film of claim 11, wherein an adhesive strength between the upper surface of the protective film and the lower surface of the second hole film is about 10 gf/in to about 20 gf/in. ### Claim 13 (depends on 12) The release film of claim 12, wherein the second hole film comprises: a first portion on an upper surface of the first hole film and an upper surface of the protective film; and a second portion extending, from the first portion, further outward than a border of the display device. ### Claim 14 (depends on 13) The release film of claim 13, wherein the protective film comprises a first protective film, a second protective film, and a third protective film which are sequentially stacked from a lower part to an upper part, and when viewed on a plane, a border of the second protective film is protrudes further outward than a border of the third protective film. ### Claim 15 (depends on 14) The release film of claim 14, wherein a border of the first portion is on an upper surface of the second protective film. ### Claim 16 (depends on 14) The release film of claim 14, wherein a sum of a thickness of the first protective film and a thickness of the second protective film is the same as a thickness of the first hole film. ### Claim 17 (depends on 16) The release film of claim 16, wherein a height of an upper surface of the first hole film is the same as a height of an upper surface of the second protective film. ### Claim 18 (depends on 14) The release film of claim 14, wherein an adhesive strength between a rear surface of the display device and a lower surface of the first protective film is about 10 gf/in to about 20 gf/in. ### Claim 19 (depends on 13) The release film of claim 13, wherein when viewed on a plane, an area of the first portion is greater than an area of the first hole film. ### Claim 20 (depends on 13) The release film of claim 13, wherein when viewed on a plane, a shape of the first portion corresponds to a shape of the protective film facing the first portion.